Gotta add Saved by the Bell to my list. I hadn't seen it in years then I got the 1st and 2nd seasons as a gift and started watching it again. Yes it can be cheesy, but that was the 80's/early 90's and I still love it.

Shows that are still airing:Doctor WhoSherlockElementaryOnce Upon a TimeCommunity

Shows that were cancelled, or just ended on their own:FringeChuckBattlestar GalacticaDollhouseFireflyRurouni KenshinTerminator:Sarah Connor ChroniclesSmallvilleStargate SG-1 and UniverseI Love LucyMoonlightTraveler

I'm sure there is more, but these are the ones that come to mind....

"I'll walk forever with stories inside me that the people I love the most can never hear."